Football Paradise understands that if the ban was extended, any appeal from Juventus would have to be heard before match day three, when Ronaldo had hoped to face his old club Manchester United at Old Trafford.

Ronaldo left the pitch in tears after German referee Felix Brych decided to send him off.

Brych was alerted to the incident by one of the additional officials stationed behind the goal Juventus were attacking.

Ronaldo, second from right, is consoled by team-mate Federico Bernardeschi (Alberto Saiz/AP)

VAR was used largely successfully at this summer’s World Cup but is not yet in use in the Champions League.

“Going down to 10 men in the Champions League for an incident like that isdisappointing,” Allegri said.

“We risked losing tonight with this and we’ll miss him for the next games too.”

Ronaldo will definitely miss Juve’s home match against Young Boys on October 2.

Cristiano Ronaldo enjoyed great success at Manchester United (Martin Rickett/PA)

It would seem unlikely that his ban would be extended, with Article 15 of UEFA’s regulations stating that bans of more than one game are for offences such as abusive language towards a match official, serious assault or for receiving a caution or red card on purpose.

Two penalties from Miralem Pjanic gave Juventus the victory in Valencia.